function shouldBe(actual, expected) { | |
if (actual !== expected) | |
throw new Error('bad value: ' + actual); | |
} | |
var a = Symbol("a"); | |
var b = Symbol("b"); | |
var c = Symbol("c"); | |
var d = Symbol("d"); | |
var e = Symbol("e"); | |
var obj = { | |
[a]: 1, | |
[b]: 2, | |
[c]: 3, | |
[d]: null, | |
[e]: 'e' | |
}; | |
function test(src) { | |
var o = {}; | |
var keys = Object.getOwnPropertySymbols(src); | |
for (var i = 0; i < keys.length; ++i) { | |
var key = keys[i]; | |
o[key] = src[key]; | |
} | |
return o; | |
} | |
noInline(test); | |
for (var i = 0; i < 1e4; ++i) { | |
var result = test(obj); | |
shouldBe(result[a], 1); | |
shouldBe(result[b], 2); | |
shouldBe(result[c], 3); | |
shouldBe(result[d], null); | |
shouldBe(result[e], 'e'); | |
} |